package com.magina.antiPro.webSocket;

import java.io.IOException;
import java.util.concurrent.CopyOnWriteArraySet;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;

import lombok.extern.slf4j.Slf4j;

import org.springframework.stereotype.Component;
@Slf4j
//@ServerEndpoint("/websocket/{sid}")
@ServerEndpoint(value = "/websocket", configurator = WebSocketConfig.class)
@Component
public class WebSocketServer {
    //静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
    private static int onlineCount = 0;
    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();

    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    //接收sid
    private String sid="";

    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session ,EndpointConfig config) {
        this.session = session;
        webSocketSet.add(this);     //加入set中
        addOnlineCount();           //在线数加1
        String httpSessionId = (String) config.getUserProperties().get("sessionId");
        this.sid = httpSessionId;
        log.info("Start  method........" + httpSessionId);
        log.info("有新连接加入！当前在线人数为" + getOnlineCount());
        //获取WebsocketConfig.java中配置的“sessionId”信息值

        try {
            sendMessage("连接成功");
        } catch (IOException e) {
            log.error("websocket IO异常");
        }
    }
    //	//连接打开时执行
    //	@OnOpen
    //	public void onOpen(@PathParam("user") String user, Session session) {
    //		currentUser = user;
    //		System.out.println("Connected ... " + session.getId());
    //	}

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);  //从set中删除
        subOnlineCount();           //在线数减1
        log.info("有一连接关闭！当前在线人数为" + getOnlineCount());
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息*/
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("收到来自窗口"+session.getId()+"的信息:"+message);

        //群发消息
        for (WebSocketServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     *
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }


    public void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }


    /**
     * 群发自定义消息
     * */
//    public static void sendInfo(String message) throws IOException {
//        log.info(message);
//        for (WebSocketServer item : webSocketSet) {
//            try {
//                item.sendMessage(message);
//            } catch (IOException e) {
//                continue;
//            }
//        }
//    }

    /**
     * 群发自定义消息
     * */
    public static void sendInfo(String message,String sid) throws IOException {
        log.info("推送消息到窗口"+sid+"，推送内容:"+message);
        for (WebSocketServer item : webSocketSet) {
            try {
                //这里可以设定只推送给这个sid的，为null则全部推送
                if(sid==null) {
                    item.sendMessage(message);
                }else if(item.sid.equals(sid)){
                    item.sendMessage(message);
                }
            } catch (IOException e) {
                continue;
            }
        }
    }


    public static synchronized int getOnlineCount() {
        return onlineCount;
    }

    public static synchronized void addOnlineCount() {
        WebSocketServer.onlineCount++;
    }

    public static synchronized void subOnlineCount() {
        WebSocketServer.onlineCount--;
    }
}
